The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1988
Filed:
Jan. 23, 1987
Gee-Kung Chang, New Providence, NJ (US);
Adrian R Hartman, New Providence, NJ (US);
Harry T Weston, New Providence, NJ (US);
American Telephone and Telegraph Company, AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A solid-state relay is combined with a control circuit to form a switch which is bilateral and linear through the origin, can withstand large current or voltage surges, and can be toggled either electrically or optically. The relay portion comprises either a pair of or two subsets of DMOS transistors, and the pair of transistors or selected ones of each subset cooperate to form a pair of oppositely poled thyristors. The control circuit provides well regulated turn-on and turn-off of the relay and provides good immunity against high voltage transients on the switch's main terminals. The control circuit also serves to limit the maximum voltage that is applied to the gate oxides of the transistors.